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Determine head type of input rules

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This commit is contained in:
Patrick Lühne
2020-02-01 17:13:43 +01:00
parent aaea04d51b
commit 142531d334
3 changed files with 59 additions and 41 deletions
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56
src/translate/verify_properties/translate_head.rs
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@@ -1,7 +1,7 @@
pub struct HeadAtom<'a>
{
predicate_declaration: std::rc::Rc<foliage::PredicateDeclaration>,
arguments: &'a [clingo::ast::Term<'a>],
pub predicate_declaration: std::rc::Rc<foliage::PredicateDeclaration>,
pub arguments: &'a [clingo::ast::Term<'a>],
}
pub enum HeadType<'a>
@@ -35,6 +35,29 @@ where
match head_literal.head_literal_type()
{
clingo::ast::HeadLiteralType::Literal(literal) =>
{
if literal.sign() != clingo::ast::Sign::None
{
return Err(crate::Error::new_unsupported_language_feature("negated head literals"));
}
let term = match literal.literal_type()
{
clingo::ast::LiteralType::Boolean(true) => return Ok(HeadType::Trivial),
clingo::ast::LiteralType::Boolean(false) => return Ok(HeadType::IntegrityConstraint),
clingo::ast::LiteralType::Symbolic(term) => term,
_ => return Err(crate::Error::new_unsupported_language_feature("elements other than terms in rule head")),
};
let function = match term.term_type()
{
clingo::ast::TermType::Function(function) => function,
_ => return Err(crate::Error::new_unsupported_language_feature("elements other than atoms in rule head")),
};
Ok(HeadType::SingleAtom(create_head_atom(function)?))
},
clingo::ast::HeadLiteralType::Aggregate(aggregate) =>
{
if aggregate.left_guard().is_some() || aggregate.right_guard().is_some()
@@ -65,33 +88,8 @@ where
_ => return Err(crate::Error::new_unsupported_language_feature("elements other than atoms in aggregates")),
};
return Ok(HeadType::ChoiceWithSingleAtom(create_head_atom(function)?));
Ok(HeadType::ChoiceWithSingleAtom(create_head_atom(function)?))
},
clingo::ast::HeadLiteralType::Literal(literal) =>
{
if literal.sign() != clingo::ast::Sign::None
{
return Err(crate::Error::new_unsupported_language_feature("negated head literals"));
}
let term = match literal.literal_type()
{
clingo::ast::LiteralType::Boolean(true) => return Ok(HeadType::Trivial),
clingo::ast::LiteralType::Boolean(false) => return Ok(HeadType::IntegrityConstraint),
clingo::ast::LiteralType::Symbolic(term) => term,
_ => return Err(crate::Error::new_unsupported_language_feature("elements other than terms in rule head")),
};
let function = match term.term_type()
{
clingo::ast::TermType::Function(function) => function,
_ => return Err(crate::Error::new_unsupported_language_feature("elements other than atoms in rule head")),
};
return Ok(HeadType::ChoiceWithSingleAtom(create_head_atom(function)?));
},
_ => (),
_ => Err(crate::Error::new_unsupported_language_feature("elements other than literals and aggregates in rule head")),
}
Ok(HeadType::Annotation)
}